D channel monitor

Details D channel monitor D channel monitor

H - Electricity

04

J

379/3

H04J 3/12 (2006.01) H04Q 11/04 (2006.01)

Patent

CA 1313717

ABSTRACT OF THE DISCLOSURE A D channel monitor is provided which is capable of providing a plurality of operating modes for monitoring D channel operation. As such, the D channel monitor can include first and second interface elements which can be operated to appear as either an NT interface (for a TE) or as a TE interface (for an NT). A controller is provided which can control the first and second interface elements to appear as predetermined ones of the NT interface or the TE interface for respectively coupling to either a TE or an NT of the ISDN user terminal. A monitoring arrangement is also included for monitoring the D channel signals at the terminal which are received through either of the first and second interface elements. This monitoring arrangement includes means for indicating the status of the D channel signals to a user.

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